misc: display last update time in a human format (#42447)

bijoe/engine.py

@@ -16,6 +16,7 @@
 
 import collections
 import contextlib
+import datetime
 import logging
 import itertools
 import hashlib
@@ -526,6 +527,9 @@ class Engine(object):
     def __getattr__(self, name):
         return getattr(self.warehouse, name)
 
+    def timestamp(self):
+        return datetime.datetime.fromtimestamp(self.warehouse.timestamp) if self.warehouse.timestamp else None
+
     @contextlib.contextmanager
     def get_cursor(self):
         with contextlib.closing(psycopg2.connect(self.warehouse.pg_dsn)) as connection: